Auto merge of #135994 - 1c3t3a:rename-unsafe-ptr, r=oli-obk

Rename rustc_middle::Ty::is_unsafe_ptr to is_raw_ptr

The wording unsafe pointer is less common and not mentioned in a lot of places, instead this is usually called a "raw pointer". For the sake of uniformity, we rename this method.
This came up during the review of
rust-lang/rust#134424.

r? `@Noratrieb`

Author: bors

crates/hir-ty/src/infer/coerce.rs

@@ -373,7 +373,7 @@ impl InferenceTable<'_> {
         // Check that the types which they point at are compatible.
         let from_raw = TyKind::Raw(to_mt, from_inner.clone()).intern(Interner);
 
-        // Although references and unsafe ptrs have the same
+        // Although references and raw ptrs have the same
         // representation, we still register an Adjust::DerefRef so that
         // regionck knows that the region for `a` must be valid here.
         if is_ref {